1958 DISEASES OF THE GENERATIVE SYSTEM 



Monsters. — These are divided into: — 



A. Single monsters : — 



I. Autositic : — Ectromelus, Symelus, Exencephalus, 

 Pseudencephalus, Anencephalus, Cyclocephalus, and 

 Otocephalus. 



II. Omphalositic : — Paracephalus, Acephalus, Asomata, 

 and Anideus. 



Fig. 787. — Syncephalus or Janus. 

 (This form of monster is fairly common in Ceylon.) 



B. Composite monsters : — 



I. Double autositic : — 



{a) Terata katadidyma : — Diprosopus, Dicephalus, 



Ischiopagus, Pyopagus. 

 (6) Terata anadidyma : — ^Dipygus, Syncephalus, 

 Craniopagus. 



(c) Terata anakatadidyma : — Prosopothoracopagus, 

 Omphalopagus, Rachipagus. 



